Codes meaning : A short symbol, often with little relation to the item it represents. A body of law, sanctioned by legislation, in which the rules of law to be specifically applied by the courts are set forth in systematic form; a compilation of laws by public authority; a digest. Any system of principles, rules or regulations relating to one subject. A set of rules for converting information into another form or representation. A message represented by rules intended to conceal its meaning. A cryptographic system using a codebook that converts words or phrases into codewords. Instructions for a computer, written in a programming language; the input of a translator, an interpreter or a browser, namely: source code, machine code, bytecode. (scientific programming) A program. A particular lect or language variety. An emergency requiring situation-trained members of the staff. To write software programs. To add codes to a dataset. To categorise by assigning identifiers from a schedule, for example CPT coding for medical insurance purposes. To encode. To encode a protein. To call a hospital emergency code. Of a patient, to suffer a sudden medical emergency (a code blue) such as cardiac arrest.